/*
 * Copyright (c) Souldbminer and Horizon OC Contributors
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
 
/* --------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <p-sam@d3vs.net>, <natinusala@gmail.com>, <m4x@m4xw.net>
 * wrote this file. As long as you retain this notice you can do whatever you
 * want with this stuff. If you meet any of us some day, and you think this
 * stuff is worth it, you can buy us a beer in return.  - The sys-clk authors
 * --------------------------------------------------------------------------
 */


#include <nxExt.h>
#include "board.h"
#include "errors.h"
#include "rgltr.h"
#include "file_utils.h"
#include <algorithm> // for std::clamp
#include <math.h>
#include <numeric>

#define HOSSVC_HAS_CLKRST (hosversionAtLeast(8,0,0))
#define HOSSVC_HAS_TC (hosversionAtLeast(5,0,0))
#define NVGPU_GPU_IOCTL_PMU_GET_GPU_LOAD 0x80044715

#define systemtickfrequency 19200000
#define systemtickfrequencyF 19200000.0f
#define CPU_TICK_WAIT (1000'000ULL)

Result nvCheck = 1;

Thread gpuLThread;
Thread cpuCore0Thread;
Thread cpuCore1Thread;
Thread cpuCore2Thread;
Thread cpuCore3Thread;

uint32_t GPU_Load_u = 0, fd = 0;

static SysClkSocType g_socType = SysClkSocType_Erista;
static HorizonOCConsoleType g_consoleType = HorizonOCConsoleType_Unknown;

uint64_t idletick0 = systemtickfrequency;
uint64_t idletick1 = systemtickfrequency;
uint64_t idletick2 = systemtickfrequency;
uint64_t idletick3 = systemtickfrequency;
u32 cpu0, cpu1, cpu2, cpu3, cpuAvg;

const char* Board::GetModuleName(SysClkModule module, bool pretty)
{
    ASSERT_ENUM_VALID(SysClkModule, module);
    return sysclkFormatModule(module, pretty);
}

const char* Board::GetProfileName(SysClkProfile profile, bool pretty)
{
    ASSERT_ENUM_VALID(SysClkProfile, profile);
    return sysclkFormatProfile(profile, pretty);
}

const char* Board::GetThermalSensorName(SysClkThermalSensor sensor, bool pretty)
{
    ASSERT_ENUM_VALID(SysClkThermalSensor, sensor);
    return sysclkFormatThermalSensor(sensor, pretty);
}

const char* Board::GetPowerSensorName(SysClkPowerSensor sensor, bool pretty)
{
    ASSERT_ENUM_VALID(SysClkPowerSensor, sensor);
    return sysclkFormatPowerSensor(sensor, pretty);
}

PcvModule Board::GetPcvModule(SysClkModule sysclkModule)
{
    switch(sysclkModule)
    {
        case SysClkModule_CPU:
            return PcvModule_CpuBus;
        case SysClkModule_GPU:
            return PcvModule_GPU;
        case SysClkModule_MEM:
            return PcvModule_EMC;
        default:
            ASSERT_ENUM_VALID(SysClkModule, sysclkModule);
    }

    return (PcvModule)0;
}

PcvModuleId Board::GetPcvModuleId(SysClkModule sysclkModule)
{
    PcvModuleId pcvModuleId;
    Result rc = pcvGetModuleId(&pcvModuleId, GetPcvModule(sysclkModule));
    ASSERT_RESULT_OK(rc, "pcvGetModuleId");

    return pcvModuleId;
}

void CheckCore0(void*) {
	while(true) {
		uint64_t idletick_a0 = 0;
		uint64_t idletick_b0 = 0;
		svcGetInfo(&idletick_b0, InfoType_IdleTickCount, INVALID_HANDLE, 0);
        svcSleepThread(CPU_TICK_WAIT);
		svcGetInfo(&idletick_a0, InfoType_IdleTickCount, INVALID_HANDLE, 0);
		idletick0 = idletick_a0 - idletick_b0;
	}
}

void CheckCore1(void*) {
	while(true) {
		uint64_t idletick_a1 = 0;
		uint64_t idletick_b1 = 0;
		svcGetInfo(&idletick_b1, InfoType_IdleTickCount, INVALID_HANDLE, 1);
        svcSleepThread(CPU_TICK_WAIT);
        svcGetInfo(&idletick_a1, InfoType_IdleTickCount, INVALID_HANDLE, 1);
		idletick1 = idletick_a1 - idletick_b1;
	}
}

void CheckCore2(void*) {
	while(true) {
		uint64_t idletick_a2 = 0;
		uint64_t idletick_b2 = 0;
		svcGetInfo(&idletick_b2, InfoType_IdleTickCount, INVALID_HANDLE, 2);
		svcSleepThread(CPU_TICK_WAIT);
		svcGetInfo(&idletick_a2, InfoType_IdleTickCount, INVALID_HANDLE, 2);
		idletick2 = idletick_a2 - idletick_b2;
	}
}

void CheckCore3(void*) {
	while(true) {
		uint64_t idletick_a3 = 0;
		uint64_t idletick_b3 = 0;
		svcGetInfo(&idletick_b3, InfoType_IdleTickCount, INVALID_HANDLE, 3);
		svcSleepThread(CPU_TICK_WAIT);
		svcGetInfo(&idletick_a3, InfoType_IdleTickCount, INVALID_HANDLE, 3);
		idletick3 = idletick_a3 - idletick_b3;
	}
}

void gpuLoadThread(void*) {
    #define gpu_samples_average 8
    uint32_t gpu_load_array[gpu_samples_average] = {0};
    size_t i = 0;
    if (R_SUCCEEDED(nvCheck)) do {
        u32 temp;
        if (R_SUCCEEDED(nvIoctl(fd, NVGPU_GPU_IOCTL_PMU_GET_GPU_LOAD, &temp))) {
            gpu_load_array[i++ % gpu_samples_average] = temp;
            GPU_Load_u = std::accumulate(&gpu_load_array[0], &gpu_load_array[gpu_samples_average], 0) / gpu_samples_average;
        }
        svcSleepThread(16'666'000); // wait a bit (this is the perfect amount of time to keep the reading accurate)
    } while(true);
}


void Board::Initialize()
{
    Result rc = 0;

    if(HOSSVC_HAS_CLKRST)
    {
        rc = clkrstInitialize();
        ASSERT_RESULT_OK(rc, "clkrstInitialize");
    }
    else
    {
        rc = pcvInitialize();
        ASSERT_RESULT_OK(rc, "pcvInitialize");
    }

    rc = apmExtInitialize();
    ASSERT_RESULT_OK(rc, "apmExtInitialize");

    rc = psmInitialize();
    ASSERT_RESULT_OK(rc, "psmInitialize");

    if(HOSSVC_HAS_TC)
    {
        rc = tcInitialize();
        ASSERT_RESULT_OK(rc, "tcInitialize");
    }

    rc = max17050Initialize();
    ASSERT_RESULT_OK(rc, "max17050Initialize");

    rc = tmp451Initialize();
    ASSERT_RESULT_OK(rc, "tmp451Initialize");

    if (R_SUCCEEDED(nvInitialize())) nvCheck = nvOpen(&fd, "/dev/nvhost-ctrl-gpu");

    threadCreate(&gpuLThread, gpuLoadThread, NULL, NULL, 0x1000, 0x3F, -2);
	threadStart(&gpuLThread);

    threadCreate(&cpuCore0Thread, CheckCore0, NULL, NULL, 0x1000, 0x10, 0);
	threadStart(&cpuCore0Thread);

	threadCreate(&cpuCore1Thread, CheckCore1, NULL, NULL, 0x1000, 0x10, 1);
	threadStart(&cpuCore1Thread);

	threadCreate(&cpuCore2Thread, CheckCore2, NULL, NULL, 0x1000, 0x10, 2);
	threadStart(&cpuCore2Thread);

	threadCreate(&cpuCore3Thread, CheckCore3, NULL, NULL, 0x1000, 0x10, 3);
	threadStart(&cpuCore3Thread);


    FetchHardwareInfos();
}

void Board::Exit()
{
    if(HOSSVC_HAS_CLKRST)
    {
        clkrstExit();
    }
    else
    {
        pcvExit();
    }

    apmExtExit();
    psmExit();

    if(HOSSVC_HAS_TC)
    {
        tcExit();
    }

    max17050Exit();
    tmp451Exit();

    threadClose(&gpuLThread);
    threadClose(&cpuCore0Thread);
    threadClose(&cpuCore1Thread);
    threadClose(&cpuCore2Thread);
    threadClose(&cpuCore3Thread);

}

SysClkProfile Board::GetProfile()
{
    std::uint32_t mode = 0;
    Result rc = apmExtGetPerformanceMode(&mode);
    ASSERT_RESULT_OK(rc, "apmExtGetPerformanceMode");

    if(mode)
    {
        return SysClkProfile_Docked;
    }

    PsmChargerType chargerType;

    rc = psmGetChargerType(&chargerType);
    ASSERT_RESULT_OK(rc, "psmGetChargerType");

    if(chargerType == PsmChargerType_EnoughPower)
    {
        return SysClkProfile_HandheldChargingOfficial;
    }
    else if(chargerType == PsmChargerType_LowPower)
    {
        return SysClkProfile_HandheldChargingUSB;
    }

    return SysClkProfile_Handheld;
}

void Board::SetHz(SysClkModule module, std::uint32_t hz)
{
    Result rc = 0;

    if(HOSSVC_HAS_CLKRST)
    {
        ClkrstSession session = {0};

        rc = clkrstOpenSession(&session, Board::GetPcvModuleId(module), 3);
        ASSERT_RESULT_OK(rc, "clkrstOpenSession");

        rc = clkrstSetClockRate(&session, hz);
        ASSERT_RESULT_OK(rc, "clkrstSetClockRate");

        clkrstCloseSession(&session);
    }
    else
    {
        rc = pcvSetClockRate(Board::GetPcvModule(module), hz);
        ASSERT_RESULT_OK(rc, "pcvSetClockRate");
    }
}

std::uint32_t Board::GetHz(SysClkModule module)
{
    Result rc = 0;
    std::uint32_t hz = 0;

    if(HOSSVC_HAS_CLKRST)
    {
        ClkrstSession session = {0};

        rc = clkrstOpenSession(&session, Board::GetPcvModuleId(module), 3);
        ASSERT_RESULT_OK(rc, "clkrstOpenSession");

        rc = clkrstGetClockRate(&session, &hz);
        ASSERT_RESULT_OK(rc, "clkrstSetClockRate");

        clkrstCloseSession(&session);
    }
    else
    {
        rc = pcvGetClockRate(Board::GetPcvModule(module), &hz);
        ASSERT_RESULT_OK(rc, "pcvGetClockRate");
    }

    return hz;
}

std::uint32_t Board::GetRealHz(SysClkModule module)
{
    switch(module)
    {
        case SysClkModule_CPU:
            return t210ClkCpuFreq();
        case SysClkModule_GPU:
            return t210ClkGpuFreq();
        case SysClkModule_MEM:
            return t210ClkMemFreq();
        default:
            ASSERT_ENUM_VALID(SysClkModule, module);
    }

    return 0;
}

void Board::GetFreqList(SysClkModule module, std::uint32_t* outList, std::uint32_t maxCount, std::uint32_t* outCount)
{
    Result rc = 0;
    PcvClockRatesListType type;
    s32 tmpInMaxCount = maxCount;
    s32 tmpOutCount = 0;

    if(HOSSVC_HAS_CLKRST)
    {
        ClkrstSession session = {0};

        rc = clkrstOpenSession(&session, Board::GetPcvModuleId(module), 3);
        ASSERT_RESULT_OK(rc, "clkrstOpenSession");

        rc = clkrstGetPossibleClockRates(&session, outList, tmpInMaxCount, &type, &tmpOutCount);
        ASSERT_RESULT_OK(rc, "clkrstGetPossibleClockRates");

        clkrstCloseSession(&session);
    }
    else
    {
        rc = pcvGetPossibleClockRates(Board::GetPcvModule(module), outList, tmpInMaxCount, &type, &tmpOutCount);
        ASSERT_RESULT_OK(rc, "pcvGetPossibleClockRates");
    }

    if(type != PcvClockRatesListType_Discrete)
    {
        ERROR_THROW("Unexpected PcvClockRatesListType: %u (module = %s)", type, Board::GetModuleName(module, false));
    }

    *outCount = tmpOutCount;
}

void Board::ResetToStock()
{
    Result rc = 0;
    if(hosversionAtLeast(9,0,0))
    {
        std::uint32_t confId = 0;
        rc = apmExtGetCurrentPerformanceConfiguration(&confId);
        ASSERT_RESULT_OK(rc, "apmExtGetCurrentPerformanceConfiguration");

        SysClkApmConfiguration* apmConfiguration = NULL;
        for(size_t i = 0; sysclk_g_apm_configurations[i].id; i++)
        {
            if(sysclk_g_apm_configurations[i].id == confId)
            {
                apmConfiguration = &sysclk_g_apm_configurations[i];
                break;
            }
        }

        if(!apmConfiguration)
        {
            ERROR_THROW("Unknown apm configuration: %x", confId);
        }

        Board::SetHz(SysClkModule_CPU, apmConfiguration->cpu_hz);
        Board::SetHz(SysClkModule_GPU, apmConfiguration->gpu_hz);
        Board::SetHz(SysClkModule_MEM, apmConfiguration->mem_hz);
    }
    else
    {
        std::uint32_t mode = 0;
        rc = apmExtGetPerformanceMode(&mode);
        ASSERT_RESULT_OK(rc, "apmExtGetPerformanceMode");

        rc = apmExtSysRequestPerformanceMode(mode);
        ASSERT_RESULT_OK(rc, "apmExtSysRequestPerformanceMode");
    }
}

void Board::ResetToStockCpu()
{
    Result rc = 0;
    if(hosversionAtLeast(9,0,0))
    {
        std::uint32_t confId = 0;
        rc = apmExtGetCurrentPerformanceConfiguration(&confId);
        ASSERT_RESULT_OK(rc, "apmExtGetCurrentPerformanceConfiguration");

        SysClkApmConfiguration* apmConfiguration = NULL;
        for(size_t i = 0; sysclk_g_apm_configurations[i].id; i++)
        {
            if(sysclk_g_apm_configurations[i].id == confId)
            {
                apmConfiguration = &sysclk_g_apm_configurations[i];
                break;
            }
        }

        if(!apmConfiguration)
        {
            ERROR_THROW("Unknown apm configuration: %x", confId);
        }

        Board::SetHz(SysClkModule_CPU, apmConfiguration->cpu_hz);
    }
    else
    {
        std::uint32_t mode = 0;
        rc = apmExtGetPerformanceMode(&mode);
        ASSERT_RESULT_OK(rc, "apmExtGetPerformanceMode");

        rc = apmExtSysRequestPerformanceMode(mode);
        ASSERT_RESULT_OK(rc, "apmExtSysRequestPerformanceMode");
    }
}

void Board::ResetToStockMem()
{
    Result rc = 0;
    if(hosversionAtLeast(9,0,0))
    {
        std::uint32_t confId = 0;
        rc = apmExtGetCurrentPerformanceConfiguration(&confId);
        ASSERT_RESULT_OK(rc, "apmExtGetCurrentPerformanceConfiguration");

        SysClkApmConfiguration* apmConfiguration = NULL;
        for(size_t i = 0; sysclk_g_apm_configurations[i].id; i++)
        {
            if(sysclk_g_apm_configurations[i].id == confId)
            {
                apmConfiguration = &sysclk_g_apm_configurations[i];
                break;
            }
        }

        if(!apmConfiguration)
        {
            ERROR_THROW("Unknown apm configuration: %x", confId);
        }

        Board::SetHz(SysClkModule_MEM, apmConfiguration->mem_hz);
    }
    else
    {
        std::uint32_t mode = 0;
        rc = apmExtGetPerformanceMode(&mode);
        ASSERT_RESULT_OK(rc, "apmExtGetPerformanceMode");

        rc = apmExtSysRequestPerformanceMode(mode);
        ASSERT_RESULT_OK(rc, "apmExtSysRequestPerformanceMode");
    }
}

void Board::ResetToStockGpu()
{
    Result rc = 0;
    if(hosversionAtLeast(9,0,0))
    {
        std::uint32_t confId = 0;
        rc = apmExtGetCurrentPerformanceConfiguration(&confId);
        ASSERT_RESULT_OK(rc, "apmExtGetCurrentPerformanceConfiguration");

        SysClkApmConfiguration* apmConfiguration = NULL;
        for(size_t i = 0; sysclk_g_apm_configurations[i].id; i++)
        {
            if(sysclk_g_apm_configurations[i].id == confId)
            {
                apmConfiguration = &sysclk_g_apm_configurations[i];
                break;
            }
        }

        if(!apmConfiguration)
        {
            ERROR_THROW("Unknown apm configuration: %x", confId);
        }

        Board::SetHz(SysClkModule_GPU, apmConfiguration->gpu_hz);
    }
    else
    {
        std::uint32_t mode = 0;
        rc = apmExtGetPerformanceMode(&mode);
        ASSERT_RESULT_OK(rc, "apmExtGetPerformanceMode");

        rc = apmExtSysRequestPerformanceMode(mode);
        ASSERT_RESULT_OK(rc, "apmExtSysRequestPerformanceMode");
    }
}
std::uint32_t Board::GetTemperatureMilli(SysClkThermalSensor sensor)
{
    std::int32_t millis = 0;

    if(sensor == SysClkThermalSensor_SOC)
    {
        millis = tmp451TempSoc();
    }
    else if(sensor == SysClkThermalSensor_PCB)
    {
        millis = tmp451TempPcb();
    }
    else if(sensor == SysClkThermalSensor_Skin)
    {
        if(HOSSVC_HAS_TC)
        {
            Result rc;
            rc = tcGetSkinTemperatureMilliC(&millis);
            ASSERT_RESULT_OK(rc, "tcGetSkinTemperatureMilliC");
        }
    }
    else
    {
        ASSERT_ENUM_VALID(SysClkThermalSensor, sensor);
    }

    return std::max(0, millis);
}

std::int32_t Board::GetPowerMw(SysClkPowerSensor sensor)
{
    switch(sensor)
    {
        case SysClkPowerSensor_Now:
            return max17050PowerNow();
        case SysClkPowerSensor_Avg:
            return max17050PowerAvg();
        default:
            ASSERT_ENUM_VALID(SysClkPowerSensor, sensor);
    }

    return 0;
}

std::uint32_t Board::GetPartLoad(SysClkPartLoad loadSource)
{		
    switch(loadSource)
    {
        case SysClkPartLoad_EMC:
            return t210EmcLoadAll();
        case SysClkPartLoad_EMCCpu:
            return t210EmcLoadCpu();
        case HocClkPartLoad_GPU:
            return GPU_Load_u;
        case HocClkPartLoad_CPUAvg:
            return (idletick0 + idletick1 + idletick2 + idletick3) / 4;
        default:
            ASSERT_ENUM_VALID(SysClkPartLoad, loadSource);
    }

    return 0;
}


SysClkSocType Board::GetSocType() {
    return g_socType;
}

HorizonOCConsoleType Board::GetConsoleType() {
    return g_consoleType;
}

void Board::FetchHardwareInfos()
{
    u64 sku = 0;
    Result rc = splInitialize();
    ASSERT_RESULT_OK(rc, "splInitialize");

    rc = splGetConfig(SplConfigItem_HardwareType, &sku);
    ASSERT_RESULT_OK(rc, "splGetConfig");

    splExit();

    switch(sku)
    {
        case 2:
        case 3:
        case 4:
        case 5:
            g_socType = SysClkSocType_Mariko;
            break;
        default:
            g_socType = SysClkSocType_Erista;
    }

    g_consoleType = (HorizonOCConsoleType)sku;
}

/*
* Switch Power domains (max77620):
* Name  | Usage         | uV step | uV min | uV default | uV max  | Init
*-------+---------------+---------+--------+------------+---------+------------------
*  sd0  | SoC           | 12500   | 600000 |  625000    | 1400000 | 1.125V (pkg1.1)
*  sd1  | SDRAM         | 12500   | 600000 | 1125000    | 1125000 | 1.1V   (pkg1.1)
*  sd2  | ldo{0-1, 7-8} | 12500   | 600000 | 1325000    | 1350000 | 1.325V (pcv)
*  sd3  | 1.8V general  | 12500   | 600000 | 1800000    | 1800000 |
*  ldo0 | Display Panel | 25000   | 800000 | 1200000    | 1200000 | 1.2V   (pkg1.1)
*  ldo1 | XUSB, PCIE    | 25000   | 800000 | 1050000    | 1050000 | 1.05V  (pcv)
*  ldo2 | SDMMC1        | 50000   | 800000 | 1800000    | 3300000 |
*  ldo3 | GC ASIC       | 50000   | 800000 | 3100000    | 3100000 | 3.1V   (pcv)
*  ldo4 | RTC           | 12500   | 800000 |  850000    |  850000 | 0.85V  (AO, pcv)
*  ldo5 | GC Card       | 50000   | 800000 | 1800000    | 1800000 | 1.8V   (pcv)
*  ldo6 | Touch, ALS    | 50000   | 800000 | 2900000    | 2900000 | 2.9V   (pcv)
*  ldo7 | XUSB          | 50000   | 800000 | 1050000    | 1050000 | 1.05V  (pcv)
*  ldo8 | XUSB, DP, MCU | 50000   | 800000 | 1050000    | 2800000 | 1.05V/2.8V (pcv)

typedef enum {
    PcvPowerDomainId_Max77620_Sd0  = 0x3A000080,
    PcvPowerDomainId_Max77620_Sd1  = 0x3A000081, // vdd2
    PcvPowerDomainId_Max77620_Sd2  = 0x3A000082,
    PcvPowerDomainId_Max77620_Sd3  = 0x3A000083,
    PcvPowerDomainId_Max77620_Ldo0 = 0x3A0000A0,
    PcvPowerDomainId_Max77620_Ldo1 = 0x3A0000A1,
    PcvPowerDomainId_Max77620_Ldo2 = 0x3A0000A2,
    PcvPowerDomainId_Max77620_Ldo3 = 0x3A0000A3,
    PcvPowerDomainId_Max77620_Ldo4 = 0x3A0000A4,
    PcvPowerDomainId_Max77620_Ldo5 = 0x3A0000A5,
    PcvPowerDomainId_Max77620_Ldo6 = 0x3A0000A6,
    PcvPowerDomainId_Max77620_Ldo7 = 0x3A0000A7,
    PcvPowerDomainId_Max77620_Ldo8 = 0x3A0000A8,
    PcvPowerDomainId_Max77621_Cpu  = 0x3A000003,
    PcvPowerDomainId_Max77621_Gpu  = 0x3A000004,
    PcvPowerDomainId_Max77812_Cpu  = 0x3A000003,
    PcvPowerDomainId_Max77812_Gpu  = 0x3A000004,
    PcvPowerDomainId_Max77812_Dram = 0x3A000005, // vddq
} PowerDomainId;

*/

std::uint32_t Board::GetVoltage(HocClkVoltage voltage)
{
    RgltrSession session;
    Result rc = 0;
    u32 out;
    switch(voltage)
    {
        case HocClkVoltage_SOC:
            rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77620_Sd0);
            ASSERT_RESULT_OK(rc, "rgltrOpenSession")
            rgltrGetVoltage(&session, &out);
            rgltrCloseSession(&session);
            break;
        case HocClkVoltage_EMCVDD2:
            rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77620_Sd1);
            ASSERT_RESULT_OK(rc, "rgltrOpenSession")
            rgltrGetVoltage(&session, &out);
            rgltrCloseSession(&session);
            break;
        case HocClkVoltage_CPU:
            rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77621_Cpu);
            ASSERT_RESULT_OK(rc, "rgltrOpenSession")
            rgltrGetVoltage(&session, &out);
            rgltrCloseSession(&session);
            break;
        case HocClkVoltage_GPU:
            rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77621_Gpu);
            ASSERT_RESULT_OK(rc, "rgltrOpenSession")
            rgltrGetVoltage(&session, &out);
            rgltrCloseSession(&session);
            break;
        case HocClkVoltage_EMCVDDQ_MarikoOnly:
            if(Board::GetSocType() == SysClkSocType_Mariko) {
                rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77812_Dram);
                ASSERT_RESULT_OK(rc, "rgltrOpenSession")
                rgltrGetVoltage(&session, &out);
                rgltrCloseSession(&session);
            }
            break;
        case HocClkVoltage_Display:
            rc = rgltrOpenSession(&session, PcvPowerDomainId_Max77620_Ldo0);
            ASSERT_RESULT_OK(rc, "rgltrOpenSession")
            rgltrGetVoltage(&session, &out);
            rgltrCloseSession(&session);
            break;
        default:
            ASSERT_ENUM_VALID(HocClkVoltage, voltage);
    }

    return out > 0 ? out : 0;
}